SKU: 3893025266

Victron Cyrix-ct Intelligent Battery Combiner 12/24V-230A VSR

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Description

Victron Cyrix-ct Intelligent Battery Combiner 12/24V-230A VSRVictron Cyrix ct 12 24V 230A: Intelligent Battery Combiner for Dual Battery Systems Advanced Voltage Sensing Relay for Reliable Parallel Charging The Victron Cyrix ct 12 24V 230A is a microprocessor controlled voltage sensitive relay (VSR) designed to intelligently manage dual battery systems in vehicles, boats, and off grid installations. Unlike conventional split charge relays that rely on simple voltage thresholds and fixed time delays, the Cyrix

Victron Cyrix-ct 12/24V-230A: Intelligent Battery Combiner for Dual-Battery Systems

Advanced Voltage Sensing Relay for Reliable Parallel Charging

The Victron Cyrix-ct 12/24V-230A is a microprocessor-controlled voltage sensitive relay (VSR) designed to intelligently manage dual-battery systems in vehicles, boats, and off-grid installations. Unlike conventional split charge relays that rely on simple voltage thresholds and fixed time delays, the Cyrix-ct uses intelligent trend detection to prevent unwanted switching caused by momentary voltage dips or spikes. This ensures your auxiliary battery bank charges reliably without premature disconnection, even when powering high-demand loads.

Engineered for 12V and 24V auto-ranging systems, this 230A continuous battery combiner is an ideal solution for caravan battery charging, marine dual-battery setups, 4x4 auxiliary power, and commercial vehicle electrical systems. Its bidirectional voltage sensing and dual power supply allow it to engage from either battery side, making it a versatile component in any DC charging architecture.

Intelligent Trend Detection: Smarter Than a Standard VSR

Traditional battery combiners often disconnect under short, high-amperage loads or fail to connect a deeply discharged battery bank because the voltage immediately drops below the disengage threshold. The Cyrix-ct overcomes these limitations by analysing the voltage trend over time. It only reverses a connection decision if the trend has genuinely reversed, with a time delay proportional to the voltage deviation. This prevents nuisance switching and ensures stable, continuous charging.

Key Features

  • 230A continuous current rating with 500A cranking capacity for 5 seconds, supporting large battery banks and high inrush loads
  • 12/24V auto-ranging automatically detects system voltage, simplifying installation across mixed fleets
  • Bidirectional voltage sensing and dual power supply allow engagement from either battery, ideal for alternator or shore charger input
  • Start Assist function enables manual parallel connection for 30 seconds via push button or switch, providing emergency cranking power from the auxiliary battery
  • Over-temperature protection disengages the relay if contact temperature exceeds safe limits, automatically reconnecting after cooling
  • LED status indicator provides clear visual feedback: engaged, disengaged, connecting, disconnecting, and alarm states
  • Virtually zero voltage drop across the contacts, eliminating the need to increase alternator or charger output voltage as required with diode isolators
  • Prioritises starter battery by only engaging when the starter battery reaches the connect voltage, ensuring reliable engine starting
  • 16 mm (M8) long bolts allow secure connection of multiple heavy-duty cable lugs
  • IP54 protection rated for dust and water spray, suitable for engine bays and exposed installations
  • Low current consumption: less than 4 mA when open, 320 mA (12V) or 180 mA (24V) when closed

Built for Demanding Environments

The Cyrix-ct operates reliably in temperatures from -40 to +60 °C, making it suitable for Australian outback conditions, marine engine rooms, and cold-climate expeditions. Its compact dimensions (65 x 100 x 50 mm) and lightweight design (0.27 kg) allow flexible mounting in tight spaces. The included 1-metre control cable simplifies integration with existing wiring, while the robust M8 stud terminals accommodate heavy-gauge cables for minimal resistance.

Applications

  • Caravans and motorhomes: automatically charge house batteries from the alternator while driving
  • 4x4 and off-road vehicles: maintain auxiliary power for winches, fridges, and lighting
  • Marine vessels: combine starter and service battery banks for efficient charging underway or at dock
  • Commercial trucks and buses: manage multiple battery banks for lift gates, communications, and auxiliary equipment
  • Off-grid solar systems: integrate with battery chargers to parallel charge multiple battery strings

Why Choose the Cyrix-ct Over Diode Isolators?

Diode isolators introduce a voltage drop of 0.6-0.7V, requiring higher alternator output and reducing charging efficiency. The Cyrix-ct uses a mechanical relay with negligible voltage loss, ensuring your batteries receive the full charging voltage. This leads to faster, more complete charging and longer battery life, especially critical for AGM and lithium batteries that require precise voltage regulation.

Upgrade Your Dual-Battery System Today

Experience reliable, intelligent battery management with the Victron Cyrix-ct 12/24V-230A. Whether you're building a new off-grid setup or upgrading an existing split charge system, this VSR delivers the precision and durability needed for demanding mobile and marine applications. Add it to your system now and ensure your auxiliary batteries are always ready when you need them.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 3893025266

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pb
West Palm Beach, US
★★★★★ 3
Soft but flimsy
Color: Light Grey, Size: 36.0"L x 36.0"W x 7.0"Th, Color: Light Grey, Size: 36.0"L x 36.0"W x 7.0"Th
— Just wanted to add an update to say that after I left this review the seller reached out to me to get more feedback and ask how they could make the experience better. I didn’t respond because I was pretty busy. They followed up and informed me that they have issued a refund for my order and that I do not need to send the item back. I appreciate their customer service. — The product is extremely soft. The dogs seem to love it. However, the “donut” part doesn’t hold up at all and the whole bed feels really flimsy. Our dog was on it for a couple mins and when he got up there is an obvious dent from where he was laying. We got a similar bed from Costco a couple months ago for roughly the same price. The bed holds up its shape and feels solid/heavy. We wanted a second one but it was out of stock so we looked on Amazon and found this one. The dark gray one in the photo is from Costco and the light gray one is this product. I probably won’t send it back (too much hassle) but if your dogs are 25lbs+ this bed may not give the support you are looking for.
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Reviewed in the United States on January 4, 2023
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Amazon Customer
Birmingham, US
★★★★★ 5
Great value
Color: Camel, Size: 36.0"L x 36.0"W x 7.0"Th
I have three dogs and they all fight over this bed. It is so fluffy. They love it. Great vibrant color, great fit for the dogs, medium and larger.
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Reviewed in the United States on February 28, 2026
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Kathy
Lowell, US
★★★★★ 5
Nice dog bed
Color: Camel, Size: 36.0"L x 36.0"W x 7.0"Th
Dog's love them
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Reviewed in the United States on May 10, 2026
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Maria Z.
Louisville, US
★★★★★ 5
Great value, comfy, cozy, perfect!
Size: 36" x 36", Color: Grey, Size: 36" x 36", Color: Grey
My dog loves this bed. So do my husband and I. Firm, fuzzy, comfy, security and great value for the price. I recommend it and so glad I purchased it!!
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Reviewed in the United States on April 23, 2026
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Michael L.
Draper, US
★★★★★ 5
Super dog bed
Size: 23" x 23", Color: Beige
This review is from my dog Beau, “I love my new bed. It’s cushy and fits my 15 pounds of fluff and fur beautifully. I can stretch out and sleep on my back if I want. I really appreciate that it didn’t have any funky chemical smell when it arrived. My mom ordered the sand color to match my fur. She says it looks just like the picture. It’s really soft and comfortable, I won’t leave it long enough for her to wash it. She had to order a second one for the kitchen so she could finally wash the original. By the way, it washed perfectly and didn’t shrink an inch. “
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Reviewed in the United States on August 31, 2025

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